I am confuse to understand how File store in Ceph.
I do two test. where is the File or the object for the File
①rados put Python.msi Python.msi -p data
②rbd -p testpool create fio_test --size 2048
rados command of ① means use Ceph as Object storage ?
rbd command of ② means use Ceph as Block storage ?
As i known, object in Ceph is 4M by default. this Object will put in PG.
so i try do test as blow. the fio_test image store in Ceph by 512 object.
512（object） * 4 = 2048
and i can get object in testpool.
# rbd -p testpool info fio_test
rbd image 'fio_test':
size 2048 MB in 512 objects
order 22 (4096 kB objects)
block_name_prefix: rb.0.1b6f.2ae8944a
format: 1
# rados -p testpool ls |grep rb.0.1b6f.2ae8944a |wc -l
512
but when i check the data pool, only one file :Python.msi (26M), why not
split Python.msi to many object(4M) ?????
t# rados ls -p pool-B
python.msi
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